Audio Damage have brought us a big bunch of excellent iOS apps in the last few months. There have been some very notable apps like Axon 2, and Replicant 2, a couple of my favs anyway. Not Audio Damage brings Discord4, the latest version of their most popular and long-lived product, the Discord stereo pitch shifter.

This was originally modeled from the H910. However, Discord has long since become its own effect and for many it’s now a studio standby. This version includes major additions to further stretch its capabilities. This app is a stand-alone (with Inter-App Audio) and also is an AUv3 effect for use in hosts that support that format, such as Beatmaker 3, AUM, Cubasis, and Garageband. And of course, there’s a full PDF manual is available at the Audio Damage website.

Here’s more about Discord4:

Discord4 consists of three separate algorithms: a “vintage” mode (the original Discord algorithm, modeled on the Eventide H910 and H949), a “clean” mode for more modern shifting sounds, and a “granular” mode for experimental effects. Each mode has its strengths, depending on the input material, and Discord3 has a broad palette of capabilities as a result. The P1 and P2 algorithms have full control over the buffer (window) size of the shift effect, for fine tuning the shift to the input signal, or for stranger sound effects. At the extremes of the six-octave shift range, some truly strange aliasing and artifacts can be had with this control.

Discord4 retains its pair of tempo-synced delays and bandpass filters from previous versions, and adds a reverb in the feedback loop (for easy access to “shimmer” effects). We have also replaced the modulation sources from the original with our all-new FLFO (Flexible LFO) design. Panorama controls are included to control the stereo width of the wet signal. Finally, soft saturation and limiting have been added or improved throughout the signal path, for an overall improved sound and added vintage-style warmth, and to allow for extreme feedback experiments without fear of overloading your DAW’s channel.

Features

Pitch Shifting: Discord4 contains a pair of shifters with three separate algorithms (Vintage, Clean, and Granular) for different styles of pitch shifting.

Buffer Size Control: The P1 (Vintage) and P2 (Clean) algorithms have a Buffer Size control, from 32 to 2048 samples, for fine-tuning the pitch shifting effect.

Delay: Tempo-synced or free-running delays with feedback, cross-feedback, and a sophisticated bandpass filter.

Reverb: A simple stereo reverb is added to the feedback path, for “shimmer” effects and further sound exploration.

Modulation: Two of our new FLFO (Flexible Low-Frequency Oscillator) with tempo sync and an arbitrary waveform, capable of a nearly infinite number of modulation shapes using only three controls.

True Stereo Operation: Discord4 has a true stereo signal path, with entirely independent control over each side, finishing with panorama settings for stereo width.

MIDI Note Control: Six octaves of pitch-shifting can be controlled with MIDI note input.

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